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VLDB
2004
ACM
15 years 3 months ago
2004
ACM
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
SEDE
2008
14 years 11 months ago
2008
In this paper we present an energy efficient framework for processing spatial alarms on mobile clients, while maintaining low computation and storage costs. Our approach to spatia...
DMSN
2008
ACM
14 years 11 months ago
2008
ACM
With the ultimate goal of extending the data integration paradigm and query processing capabilities to ad hoc wireless networks, sensors, and stream systems, we consider how to su...
WWW
2005
ACM
15 years 10 months ago
2005
ACM
Finding all the occurrences of a twig pattern in an XML database is a core operation for efficient evaluation of XML queries. A number of algorithms have been proposed to process ...
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ICDE
2005
IEEE
15 years 11 months ago
2005
IEEE
Maintaining materialized views that have join conditions between arbitrary pairs of data sources possibly with cycles is critical for many applications. In this work, we model vie...